Datagrid Renderers: Supported operation modes

Hello, In the comment of all renderers I saw, we have the same supported modes: * - Container Support: yes * - Output Buffering: yes * - Direct Rendering: no If I have understood well, container support is related to fill(), output buff. to getOutput() and rendering to render(). However, the last 2 functions share most of their code, one returns the result of flatten while the other prints it. So I guess output buff. & rendering shall be both yes or no. BTW, I can't understand the purpose of the else part of render(): function render() { if ($this->_isOverloaded('flatten')) { $this->_isBuilt or $this->build(); echo $this->flatten(); } else { $this->build(); } } Cheers -- Michel